Or, it's peurile bullshit for children trying too hard to be offensive. Who can say?

Yah. When it comes to merch, the best thing a band can do for themselves is sell a product that A) Stands out and looks rad, and B) Can be shown off everywhere without the wearer feeling embarrassed or worried about pissing people off or whatever. If it fails the latter criterion especially, that's free advertising that the band is missing out on.